Stop mechanism for spinning machines



Jan. 1, 1924 1,479,722

G. P. MCLAUGHLIN STOP MECHANISM FOR SPINNING MACHINES Filed April 16,1923 2 Sheets-Sheet 1 IlETl- Jan. 1, 4 1,479,722

I G. P. M LAUGHLIN STOP MECHANISM FOR SPINNING MACHINES Filed April 161925 2 Sheets-Sheet 2 Patented Jan. 1, 1924.

amino STATES?- PATENT. orriee.

STOP MECHANISM FOR SPINNING MACHINES.

Application filed April 16, 1923. Serial No. 632,435.

T aZZ whom it may concern.

Be it known that I, GEORGE P. MGLAUGH- LIN, a citizen of the UnitedStates, resioing at Shickshinny, in the county of Luzerne and State ofPennsylvania, have invented certain new and useful Improvements in StopMechanisms for Spinning Machines; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in stop mechanism for spinningmachines and v has more particular reference to the Atwood,

model B machine. In machines of this and similar types, the threadsextend from the bobbins through the eyes of drop wires before they passaround the usual feed rolls which draw said threads from the bobbins tobe acted on by the usual spinning means. In case any of the threadsbreak above the feed rolls, the drop wire with which the broken threadwas previously engaged, acts to automatically bring the stop motion intoplay, but no provision whatever is made for stopping the machine if allof the threads are broken by the spinning means, at a point between thismeans and the feed rolls, the result being that the threads ball uponthe feed rolls and must be cut off and wasted. It is the object of myinvention to provide an extra drop wire having a novel association withthe usual stop mechanism so as to automatically actuate the latter incase all ofthe threads are broken in the manner mentioned, the extradrop wire being provided with an eye through which all of the threadspass after they leave the feed rolls and before they reach the spinningmeans.

With the foregoing in view, the invention resides in the novel subjectmatter hereinafter described and claimed, the descriptive matter beingsupplemented by the accomr panying drawings.

Figure 1 is a front elevation showing a portion of the Atwood stopmechanism equipped with my improvement.

Figure 2 is a vertical sectional view as indicated by line 2-2 of Fig.1, showing the normal relation of parts.

Figure 3 is a duplicate of Fig. 2 with the exception that it illustratesthe action of parts when all of the threads are broken.

Figure 4; is a horizontal sectional view as indicated by line ilof Fig.2.

Figure 5 is a perspective view of the extra drop wire.

In the drawings above briefly described, the numeral 1 designates one ofthe usual rails of an Atwood model B spinning machine. To this rail, theupper end of a frame 2 is bolted, said frame being of well knownconstruction and having a vertical guide 3 in which the controlling rod4 of the usual stop motion, is slidably received, said rod being movableupwardly to throw the machine out of action. A latch lever 5 isfulcrumed at (3 on the frame 2 and co-acts with a dog 7 on the rod 4: tonormally hold the latter against upward movement. Fulcrumed between itsends to the lower end of the latch lever ,5 is a horizontal lever 8whose front endis formed by an open frame having front and rear sidebars 9 and 10 respectively, said lever being so balanced that itnormally assumes the positiorr' shown in Fig. 2. In case any of thethreads break, however the rearwardly extending arms 11 on the usualdrop wires 12, fall onto the front bar 9 and thereby tilt the lever 8 tothe position shown in Fig. 3. This action moves the rear end of thelever upwardly into the path of an oscillating latch actuating device 13with the result that this device pushesthe entire lever forward-1y andreleases the latch lever 5 from engagement with the rod 4. This rod isthus free (see Fig. 3) to move upwardly and actuate the well known stopmotion. This action takes place in case any of the threads 1 break abovethe feed rolls 15 which draw them from the usualbobbins above the dropwires 12. The threads however usually extend directly from the feedrolls to the spinning means (not shown) after being wound several timesaround said rolls and if the spinning means breaks all of the threadsbelow these rolls, there is no'provision made for stopping the latter,with the result that a great deal of the silk or other thread is balledupon said rolls and must be out oif and totally wasted. My

invention however overcomes this difficulty.

Upon the rod 16 which forms a pivotal mounting for the drop wires 12, Ipivotally mount an extra, downwardly extending drop wire 17 having aporcelain eye 18 at its lower end, the upper end of said wire 17 beingformed with an eye 18 through which a screw 18 passes for attaching thewire to an upward extension 18 on the front end of a rearwardlyextending, horizontally offset arm 19 positioned in the same plane -Withand of greater length than the arms 11. By reference to Figs. 2 and 3,it will be seen that all of the threads pass through the eye 18 beforeextending to the spinning means from the feed rolls 15. As long as saidspinning means isproperly operating, the tension on the threads willhold the drop wire 17 in the position of Fig. 2 so that it is clear ofthe frame of the lever S. In case the threads are broken however, (seeFig. the tension on them released, with the result that the arm 19 fallsupon the rear bar 10 of the lever 8 and rocks the latter into the pathof the latch actuator 13. This actuator pushes the entire lever 8forwardly and thereby releases the latch 5 from the rod 4, permittingthe latter to act upon the stop motion and bring the machine to astandstill. Thus, balling of the threads upon the feed rolls 15 isprevented and a greatsaving is effected. In the machines now on themarket, this balling occurs so often that the feed rolls 15 are nowbeing manufactured with longitudinal grooves which facilitate the use ofa knife or a pair of shears in cutting the threads therefrom, therebysaving as much time possible and preventing scratching of the rolls bythe cutting instrument. By the use of my in vention however, there is nonecessity for cutting the threads from the feed rolls since they arenever allowed to accumulate thereon.

Attention is here directed to the fact that the arm 19 falls upon therear side bar it) of the lever frame instead of upon the front bar 9which coacts with the arms 11. This is greatly advantageous since itdoes not permit the drop wire 17 to swing forwardly to an objectionableextent. By reference to Fig. 3, it will be seen that if the arm 19 wereallowed to co-act with the front bar 9, instead of the rear bar 10, thedrop wire 1? would project forwardly from the machine to quite anextent. .This would interfere with the operator and would be veryobjectionable.

My invention is extremely simple and inexpensive, yet it is obvious thatthe same is highly eflicient and advantageous. lVhile I prefer to usethe exact details shown, it

in part of my allowed U. S. application,

Serial Number 42913752, filed August 11,

1921 and consequently receives benefit of that filing I claim:

1. In a thread spinner, the combination of a frame having a verticalguide, a rod slidable in said guide and movable to actuate a stopmechanism, a latch mounted on said frame for holding said rod normallyagainst movement, a driven latch releasing device adjacent said latch, alever fulcrumed to saidlatch and having its rear end normally clear ofsaid releasin device, upwardly extending drop wires pivoted or. saidframe and having rearwardly extending arms, the front end of said leverhaving an open frame upon whose front bar said arms are adapted to dropto rock the lever into operative relation with said latch releasingdevice when any thread brea rs, and a downwardly extending drop wirepivoted on said first named frame co-axially with the first named dropwires, said downwardly extending drop wire having an eye through whichall of the threads are trained date.

before passing to the spinning means, saiddownwardly extending drop wirebeing irovided with a relatively long rearwardiy e. tending arm adaptedto fall onto the rear side bar of the lever frame to rock the lever incase all threads are broken by the spinning means.

2. A stop mechanism operating device for use in connection with threadspinning and doubling machine, comprising a substantially L-shapedmember for disposition co-axially with pivoted drop wires, said memberhaving a short upright arm and a relatively long horizontal arm andbeing formed at the juncture of said arms' *ith a bearing opening, theshort arm also being provided with an. opening, said long arm beinglonger than the cm'responding parts of the existing drop wires, anupright wire having eyes at its ends, the lower eye being for receptionof the st ands, and a fastener passing through the upper eye into theaforesaid opening in said short arm.

In testimony whereof I have hereunto affixed my signature.

GEORGE P. McLAUGHLlN.

